<template>
  <div class="app-container">
    课程列表

    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名"/>
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="发布状态">
          <el-option :value="'Draft'" label="未发布"/>
          <el-option :value="'Normal'" label="已发布"/>
        </el-select>
      </el-form-item>


      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row>

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="课程名" width="160" />

      <el-table-column label="课程状态" width="80">
        <template slot-scope="scope">
          {{ scope.row.status==='Normal'?'已发布':'未发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" />
            
      <el-table-column prop="price" label="课程价格" width="80" />

      <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

      <el-table-column prop="viewCont" label="浏览数量" width="80" />




        <el-table-column label="操作一" width="250" align="center">
            <template slot-scope="scope">
                <p>
                    <el-button type="success" size="mini" icon="el-icon-success" @click="getCourseInfo(scope.row.id)">查看课程信息</el-button>
                </p>
                <p>
                    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeCourseById(scope.row.id)">删除课程信息</el-button>
                </p>
            </template>
        </el-table-column>

        <el-table-column label="操作二" width="250" align="center">
            <template slot-scope="scope">
                <p>
                <router-link :to="'/course/info/'+scope.row.id">
                    <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程信息</el-button>
                </router-link>
                </p>
                <p>
                <router-link :to="'/course/chapter/'+scope.row.id">
                    <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
                </router-link>
                </p>
            </template>
        </el-table-column>
    </el-table>

    <el-dialog :visible.sync="dialogCourseFormVisible" title="课程信息">
        <div class="ccInfo">
            <img :src="coursePublish.cover">
            <div class="main">
                <h2>{{ coursePublish.title }}</h2>
                <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
                <p><span>所属分类：{{ coursePublish.subjectLevelOne }} — {{ coursePublish.subjectLevelTwo }}</span></p>
                <p>课程讲师：{{ coursePublish.teacherName }}</p>
                <h3 class="red">￥{{ coursePublish.price }}</h3>
            </div>
        </div>
    </el-dialog>

  <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />

  </div>
</template>
<script>

import course from '@/api/edu/course'

export default {
    //写核心代码位置
    // data:{
    // },
    data() { //定义变量和初始值
        return {
          list:null,//查询之后接口返回集合
          page:1,//当前页
          limit:10,//每页记录数
          total:0,//总记录数
          courseQuery:{}, //条件封装对象
          coursePublish:{},
          dialogCourseFormVisible:false,
        }
    },
    created() { //页面渲染之前执行，一般调用methods定义的方法
        //调用
        this.getList() 
    },
    methods:{  
        //根据课程id查询课程 信息
        getCourseInfo(id){
            this.dialogCourseFormVisible=true
            course.getPublishCourseInfo(id).then(response=>{
                this.coursePublish=response.data.coursePublishVo
            })
        },
        removeCourseById(id){
            this.$confirm('此操作将永久删除课程, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                course.delete(id)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //回到列表页面
                    this.getList()
                })
            }) //点击取消，执行catch方法
        },
        //列表的方法
        getList(page=1) {
            this.page = page
            course.getListCourse(this.page,this.limit,this.courseQuery)
                .then(response =>{//请求成功
                    //response接口返回的数据
                    //console.log(response)
                    this.list = response.data.records
                    this.total = response.data.total
                    console.log(this.list)   
                    console.log(this.total)
                }) 
        },
        resetData() {//清空的方法
            //表单输入项数据清空
            this.courseQuery = {}
            //查询所有讲师数据
            this.getList()
        }
 
    }
}
</script>
<style scoped>
.ccInfo {
    background: #f5f5f5;
    padding: 20px;
    overflow: hidden;
    border: 1px dashed #DDD;
    margin-bottom: 40px;
    position: relative;
}
.ccInfo img {
    background: #d6d6d6;
    width: 500px;
    height: 278px;
    display: block;
    float: left;
    border: none;
}
.ccInfo .main {
    margin-left: 520px;
}

.ccInfo .main h2 {
    font-size: 28px;
    margin-bottom: 30px;
    line-height: 1;
    font-weight: normal;
}
.ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
}

.ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
}
.ccInfo .main h3 {
    left: 540px;
    bottom: 20px;
    line-height: 1;
    font-size: 28px;
    color: #d32f24;
    font-weight: normal;
    position: absolute;
}
</style>